Fix 13 logic bugs and UI issues across editor, controller, and core

Round 1: Fix updateCommandRow offset, structTypeName undo, changeNodeKind
macro, shift-click kCommandRowId leak, type filter byte-vs-column bug.
Round 2: Move kFooterIdBit to core.h, add RcxEditor destructor for cursor
cleanup, defer refresh during batch ops, use newline separator in type
picker, narrow selection on double-click edit, clear hover on keyboard
scroll, guard 0x prefix from deletion, cap array count at 100k.

src/controller.h

@@ -94,6 +94,7 @@ private:
     ComposeResult      m_lastResult;
     QSet<uint64_t>     m_selIds;
     int                m_anchorLine = -1;
+    bool               m_suppressRefresh = false;
 
     void connectEditor(RcxEditor* editor);
     void handleMarginClick(RcxEditor* editor, int margin, int line, Qt::KeyboardModifiers mods);